Malicious PDF — malware analysis report

Static analysis result for SHA-256 76478c27bb67c9ea…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 01:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 937465ff83268e501aaf436ad37f6bce SHA-1: 247dae9acf641b823177a4534598234b2678a155 SHA-256: 76478c27bb67c9ea47a6d04e434ea588d8b5eb35694d9eb890a26d03c903ac3b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting it is a 'scanned document' and includes URLs that are part of a link farm. The presence of a password archive lure heuristic suggests the document may be intended to trick the user into downloading a password-protected archive, likely containing a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=scansione%20documento%20in%20formato%20pdf
    • http://files.bombayinternationalusa.com/uploads/1/3/1/3/131380600/8600107.pdf
    • http://sibape.niallbishop.com/uploads/1/3/1/4/131407995/828857.pdf
    • http://files.michellepannorsilver.com/uploads/1/3/1/0/131070888/2f8ae263fcf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/xegaden.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/86015286761.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/90883658034.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/physiology_of_pregnancy_and_lactation.pdf
    • https://cdn.shopify.com/s/files/1/0437/1739/4586/files/molavirapimalepavig.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/jodejerabigotuxoridu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/magataraj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2397/files/84872606729.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/61170209935.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/wivijaxegonibawetowuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4578/files/rukogowijujurusaxobuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/ansiedad_depresion_y_estres.pdf
    • https://cdn.shopify.com/s/files/1/0437/2276/8535/files/2139449643.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c9e.bin
5db9ebd8be93dc1e160c2f792550a345171e46427a06fee70cf0f29f710ed316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9E 5372 bytes
font_01_sfnt_off00007ecf.bin
93b99b2a3c01a201c26fc5753019c0be48764d052f213e71e4af14db9160c581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 11084 bytes

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